package com.example.demo;

import java.util.Arrays;

import javax.servlet.http.HttpServletRequest;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

@Aspect
@Component
@Order(1)
public class WebLogAspect {
	private Logger logger = LoggerFactory.getLogger(this.getClass());
	ThreadLocal<Long> startTime = new ThreadLocal<>();
	// 切入点
	@Pointcut("execution(public * com.example.demo..*.*(..))")
	public void webLog() {
	}

	// 在切入点开始处切入内容
	@Before("webLog()")
	public void doBefore(JoinPoint joinPoint) throws Throwable {
		 startTime.set(System.currentTimeMillis());
		// 接收到请求，记录请求内容
		ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
		HttpServletRequest request = attributes.getRequest();

		// 记录下请求内容
		logger.info("URL : " + request.getRequestURL().toString());
		logger.info("HTTP_METHOD : " + request.getMethod());
		logger.info("IP : " + request.getRemoteAddr());
		logger.info("CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "."
				+ joinPoint.getSignature().getName());
		logger.info("ARGS : " + Arrays.toString(joinPoint.getArgs()));

	}

	// 使用@After在切入点结尾处切入内容
	@After("webLog()")
	public void doAfter(JoinPoint joinPoint) {
		logger.info("使用@After在切入点结尾处切入内容");
		
    }


	// 使用@AfterReturning在切入点return内容之后切入内容（可以用来对处理返回值做一些加工处理）
	@AfterReturning(returning = "ret", pointcut = "webLog()")
	public void doAfterReturning(Object ret) throws Throwable {
		// 处理完请求，返回内容
		logger.info("RESPONSE : " + ret);
		logger.info("SPEND TIME : " + (System.currentTimeMillis() - startTime.get()));
	}
}
